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[LegitReviews]NZXT Announces Kraken G10 Liquid Cooled GPU Mounting Kit - Page 64  

post #631 of 1588
Quote:
Originally Posted by valkyrie743 View Post

i may just end up getting the NZXT x40 or the Corsair H90. cant decided yet. i kinda like the software fan control that comes alone with the X40 so i may just do that and mount the rad in the rear of my case in a pull config.
Quote:
xD3aDPooLx: come on guys this is a place to get info on the G10. This isn't a place to bash it. Please keep it civil and on topic.

Thanks.

I didnt mean to come off as "bashing" the product. i really like what its doing to core temps and the price imo is awesome. just couple concerns for the long run. when i have a $700 product and most gpu vendors void the cards warranty once you replace the stock cooler. just gets some people worried.

after seeing reviews but also the guys posting their personal results here in this thread, i feel comfortable and ordered mine smile.gif i cant wait to install mine and lower my 780 Ti temps.


Actually, that's not 100% true, a few do void your warranty, more than that don't. you usually hear from people who screwed their card and then claimed it was warranty covered, then claimed it was the removed heat sink that voided it. I've never had the issue, and sadly I think i'm RMAed from all but ASUS, (I don't buy ASUS)
post #632 of 1588
Quote:
Originally Posted by valkyrie743 View Post

i may just end up getting the NZXT x40 or the Corsair H90. cant decided yet. i kinda like the software fan control that comes alone with the X40 so i may just do that and mount the rad in the rear of my case in a pull config.
I didnt mean to come off as "bashing" the product. i really like what its doing to core temps and the price imo is awesome. just couple concerns for the long run. when i have a $700 product and most gpu vendors void the cards warranty once you replace the stock cooler. just gets some people worried.

after seeing reviews but also the guys posting their personal results here in this thread, i feel comfortable and ordered mine smile.gif i cant wait to install mine and lower my 780 Ti temps.

This is why I go with EVGA cards. They dont mind you removing the stock cooling in order to stick a water block on.

Over stock cooling the G10 with a AIO will do better then a stock cooler. The stock fan without heat sinks will keep the VRM temps in place.



Side note:

We have talk to a rep over at Nvidia and picked his brain a bit about VRM temps. The sweet operation temps for VRM is around 60-80c. VRM temp is a ton different then GPU and CPU temps and I think alot of people panic when they see it higher temps on it.

Trust me its fine.
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post #633 of 1588
Quote:
Originally Posted by xD3aDPooLx View Post

Quote:
Originally Posted by valkyrie743 View Post

i may just end up getting the NZXT x40 or the Corsair H90. cant decided yet. i kinda like the software fan control that comes alone with the X40 so i may just do that and mount the rad in the rear of my case in a pull config.
I didnt mean to come off as "bashing" the product. i really like what its doing to core temps and the price imo is awesome. just couple concerns for the long run. when i have a $700 product and most gpu vendors void the cards warranty once you replace the stock cooler. just gets some people worried.

after seeing reviews but also the guys posting their personal results here in this thread, i feel comfortable and ordered mine smile.gif i cant wait to install mine and lower my 780 Ti temps.

This is why I go with EVGA cards. They dont mind you removing the stock cooling in order to stick a water block on.

Over stock cooling the G10 with a AIO will do better then a stock cooler. The stock fan without heat sinks will keep the VRM temps in place.



Side note:

We have talk to a rep over at Nvidia and picked his brain a bit about VRM temps. The sweet operation temps for VRM is around 60-80c. VRM temp is a ton different then GPU and CPU temps and I think alot of people panic when they see it higher temps on it.

Trust me its fine.

to further this, AMD claims 90C is still "safe" for VRMs. (I cannot remember the exact location, but it was in reference to 290x temps, and the VRM "safe zone" was posted)
post #634 of 1588
Quote:
Originally Posted by valkyrie743 View Post

when you say back end you mean VRM ? or gpu temp?

what AIO coolers you using on your cards?. i broke down and ordered my G10. right now im debating on which AIO cooler to get. I cant decided if i should go with a 140mm or 120mm AIO set up. i want 120MM but i dont know how much cooling i would lose going 120 over 140

I meant the vrm area @ 68C max and GPU temps have been below 59C using the Antec 620 ( it was on sale) which has a 120mm rad. Both rads have single SP 120 fans on them, 1 rad is push and the other is pull. Temp target, power target, and voltage are all at stock and both cards are clocked @ 1201/1850. I'm pretty happy with the results so far, especially the silence compared to the stock fans.
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post #635 of 1588
Quote:
Originally Posted by IF6WAS9 View Post

I meant the vrm area @ 68C max and GPU temps have been below 59C using the Antec 620 ( it was on sale) which has a 120mm rad. Both rads have single SP 120 fans on them, 1 rad is push and the other is pull. Temp target, power target, and voltage are all at stock and both cards are clocked @ 1201/1850. I'm pretty happy with the results so far, especially the silence compared to the stock fans.

So its quieter then the reference gtx 780 ti card. when on idle and max. If so i just might get one to try it out. Also are you using the stock fan that came with the bracket
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post #636 of 1588
Quote:
Originally Posted by IF6WAS9 View Post

Quote:
Originally Posted by valkyrie743 View Post

when you say back end you mean VRM ? or gpu temp?

what AIO coolers you using on your cards?. i broke down and ordered my G10. right now im debating on which AIO cooler to get. I cant decided if i should go with a 140mm or 120mm AIO set up. i want 120MM but i dont know how much cooling i would lose going 120 over 140

I meant the vrm area @ 68C max and GPU temps have been below 59C using the Antec 620 ( it was on sale) which has a 120mm rad. Both rads have single SP 120 fans on them, 1 rad is push and the other is pull. Temp target, power target, and voltage are all at stock and both cards are clocked @ 1201/1850. I'm pretty happy with the results so far, especially the silence compared to the stock fans.

I know it's working great for you, but for further thinking, if you single fan a radiator, push is twice as effective as only pull.
post #637 of 1588
Quote:
Originally Posted by drdrache View Post

I know it's working great for you, but for further thinking, if you single fan a radiator, push is twice as effective as only pull.
I noticed a big improvement when I went from pull to push on my antec 620.
post #638 of 1588
All these questions .... get a thread going for this thing already thumb.gif Lots of good info in this thread will be lost when the thread closes. Post in the official threads for this mod if you want but someone really needs to get on that soon, i think it will be a very large thread thumb.gif
post #639 of 1588
Quote:
Originally Posted by drdrache View Post

to further this, AMD claims 90C is still "safe" for VRMs. (I cannot remember the exact location, but it was in reference to 290x temps, and the VRM "safe zone" was posted)
Where people are getting 85 degrees C is bad (Click to show)
The stock GTX 780 / GTX 80 Ti VRM controller is a OnSemi NCP4206 http://www.onsemi.ru.com/pub/Collateral/NCP4206-D.PDF with max rated temp of 85°C

The GTX 780ti uses Fairchild FDMF6823A can do 60A at 100°C http://www.fairchildsemi.com/pf/FD/FDMF6823A.html , http://www.fairchildsemi.com/ds/FD/FDMF6823A.pdf
(source: http://www.overclock.net/t/1438886/official-nvidia-gtx-780-ti-owners-club/3390#post_21284532 , http://www.expreview.com/29296-3.html)

The R9 290 series' IR3567B PWM controller is rated for -40°C to 85°C ambient. www.irf.com/product-info/datasheets/data/pb-ir3567b.pdf‎

yet if you look up the datasheet for IR6811 and IR6894 mosfets used on r9 290 series you will see the VRM manufacturer uses 70°C as a reference point and the stock cooler keeps VRM ~80°C. AMD's 95°C "target temp" was for the GPU core and it was a number spouted by marketing (which usually doesn't know anything other than "our engineers said it's ok to say this"). When the GPU decreases about 50W power consumption and stops throttling under a half decent cooler like the MK-26 (at the same clocks and volts) I call BS on that being optimal. Look at Fig 12. Maximum Drain Current vs. Case Temperature , once it hits ~90°C you won't be able to get 55A drain current.

Incidentally those IR mosfets are the same mosfets used on GTX 780 Classified and MSI Lightning

IR6894 datasheets http://ec.irf.com/v6/en/US/adirect/ir?cmd=catProductDetailFrame&productID=IRF6894MTRPBF
IR6811 datasheets http://ec.irf.com/v6/en/US/adirect/ir?cmd=catProductDetailFrame&productID=IRF6811STRPBF

SK Hynix H5GQ2H24AFR-R2C (Gtx 780 Ti): 85°C (source)
Samsung K4G20325FD-FC03 (GTX 780, GTX 660): 170FBGA should also be 85°C
SK Hynix H5GQ2H24AFR-R0C (R9 290, R9 290X, GTX 760, GTX 670): 170FBGA should also be 85°C

If you go to skyn3t's GTX 780 vbios thread he recommends sub 85°C temps for VRM for that reason

Moving on... put some VRM heatsinks on your GPU if you buy Kraken G10. That's not intended as an anti-NZXT statement, it's just the fact of the matter. It's a legitimate concern that is dismissed by
Quote:
Originally Posted by http://www.nzxt.com/product/detail/138-kraken-g10-gpu-bracket.html 
The VRam and the VRMs have no heatsinks!
The G10 frees up these other components on the graphics card from proximity heat of the GPU. Running the GPU at lower temperatures also allows the VRMs to run cooler and more efficient through reduced power leak, in the words of AMD in the Legit Reviews review.

In our testing and extended use the fan is sufficient for cooling the miscellaneous components during gaming and high end computing due to the increase in efficiency.

The subject of VRam is a bit different. In our experience the VRam is completely fine without sinks, as you can see RAM modules on the rear of cards on occasion without direct cooling or sinks. The fan is sufficient for VRM and VRam cooling. If you are still concerned you can still apply lower profile ramsinks or VRM sinks. The secondary heatsink on some Nvidia cards will still allow the bracket to be mounted with the passive VRM/VRam stock cooling intact.

Edited by AlphaC - 1/7/14 at 8:09am
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post #640 of 1588
With no VRM heatsinks on my R9 290 it was around 65c -68c full load. With heatsinks it is now around 55c so yes heatsinks help but in my case were not really needed. Just makes me feel better and they were only 10 bucks. totally worth it.

Btw my card is slightly overclocked too
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